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.\" $FreeBSD: src/usr.sbin/kernbb/kernbb.8,v 1.9.2.5 2001/08/16 15:56:01 ru Exp $
.\" $DragonFly: src/usr.sbin/kernbb/kernbb.8,v 1.3 2008/09/02 11:50:46 matthias Exp $
.\"
.Dd September 2, 2008
.Dt KERNBB 8
.Os
.Sh NAME
.Nm kernbb
.Nd generate a dump of the kernels basic-block profile buffers
.Sh SYNOPSIS
.Nm
.Sh DESCRIPTION
.Nm Kernbb
is a tool used to dump the basic-block profiling buffers of the running
kernel.
.Pp
At least one source file in the running kernel must have been compiled
with the
.Fl a
option.
.Pp
The output format is
.Tn ASCII ,
consisting of one line per record with the
following fields: filename, linenumber, procedure, address, count
of executions, length of the basic-block in bytes and the product of
the previous two fields.
.Sh FILES
.Bl -tag -width /dev/kmemx -compact
.It Pa /boot/kernel
the default system
.It Pa /dev/kmem
the default memory
.El
.Sh SEE ALSO
.Xr cc 1
.Sh AUTHORS
The
.Nm
command was written by
.An Poul-Henning Kamp ,
along with the kernel-support.